Praying mantis usually lay around 200 eggs at a time that are inclosed in a hard case consisting of two layers. They ususally leave these cases on the on any hard surface, on the ground, or at the base of different kinds of plants during the spring months in most temperate climates.

In the early months of Autumn female praying mantis begin to lay their eggs. By Falls' end, all mantis' will have finished this part of the birthing cycle. They lay their eggs is a mass of foam. The babies emerge the following year. Depending upon the species of mantis they can produce 30-300 young from their eggs.